<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<style>
:root {
  --size: 110vh;
  --s: calc(var(--size) / 6);
  --bor: calc(var(--size) / 30);
  --boxShadow: calc(var(--size) / 12);
}

body {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  background-color: #000;
  overflow:hidden;
}
.circle {
  position: absolute;
  left: 50%;
  top: 50%;
  transform: translate(-50%, -50%);
  width: var(--size);
  height: var(--size);
  filter: url(#wavy) blur(1px);
}

.circle:before,
.circle:after {
  content: "";
  position: absolute;
  top: var(--s);
  left: var(--s);
  right: var(--s);
  bottom: var(--s);
  border-radius: 50%;
  border: var(--bor) solid #fff;
}
.circle:before {
  box-shadow: 0 0 var(--boxShadow) #0f0, inset 0 0 var(--boxShadow) #0f0;
  -webkit-box-reflect: below 10px
    linear-gradient(transparent, transparent, #0002);
  animation: move 5s linear infinite;
}

.circle:after {
  box-shadow: 0 0 calc(var(--bor)/2) #fff, inset 0 0 var(--bor) #fff;
}

@keyframes move {
  0% {
    box-shadow: 0 0 var(--boxShadow) #0f0, inset 0 0 var(--boxShadow) #0f0;
    filter: hue-rotate(0deg);
  }
  20% {
    box-shadow: 0 0 60px #0f0, inset 0 0 60px #0f0;
  }

  40% {
    box-shadow: 0 0 40px #0f0, inset 0 0 40px #0f0;
  }
  60% {
    box-shadow: 0 0 80px #0f0, inset 0 0 80px #0f0;
  }
  80% {
    box-shadow: 0 0 100px #0f0, inset 0 0 100px #0f0;
  }
  100% {
    box-shadow: 0 0 var(--boxShadow) #0f0, inset 0 0 var(--boxShadow) #0f0;
    filter: hue-rotate(360deg);
  }
}

svg {
  width: 0;
  height: 0;
}

</style>
<body>
    <div class="circle"></div>
    <svg>
      <filter id="wavy">
        <feTurbulence x="0" y="0" baseFrequency="0.009" numOctaves="5" speed="2">
          <animate attributeName="baseFrequency" dur="60s" values="0.02; 0.005; 0.02" repeatCount="indefinite">
        </feTurbulence>
        <feDisplacementMap in="SourceGraphic" scale="30"></feTurbulence>
      </filter>
    </svg>
</body>
</html>